US3476829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High impact polystyrene comprising a cross-linked blend of polystyrene,a diene rubber and a solution polymerized block copolymer
Assignee: Phillips Petroleum Co
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Filing: 1966-01-05
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Granted: 1969-11-04
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Expires: 1986-01-05
Abstract
No abstract record available.
Inventors
- 👤 Jerry T Gruver
- 👤 Clifford W Childers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:27
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L53/00; C08L53/02; C08L9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2623863A
Cited
US3129199A
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US3264374A
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US3264375A
Cited
US3251905A
Cited
US3231635A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |